package com.imddy.tweb.controller.verification;

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;

@Controller
public class KaptchaController {

	private static Log log = LogFactory.getLog(KaptchaController.class);
	
	private Producer kaptchaProducer=null;
	 
    @Autowired
    public void setCaptchaProducer(Producer kaptchaProducer) {
        this.kaptchaProducer = kaptchaProducer;
    }
 
    @RequestMapping("/verification/kaptcha")
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception{
        response.setDateHeader("Expires",0);
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        response.setHeader("Pragma", "no-cache");
        response.setContentType("image/jpeg");
        log.info("进入了 KaptchaController .... ");
        String capText = kaptchaProducer.createText();
        request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
        BufferedImage bi = kaptchaProducer.createImage(capText);
        ServletOutputStream out = response.getOutputStream();
        ImageIO.write(bi, "jpg", out);
        try {
            out.flush();
        } finally {
            out.close();
        }
        return null;
    }
    
}
